Malware in @mastra/agent-builder
Malware was discovered in the npm package @mastra/agent-builder. Systems with this package installed or running should be considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- @mastra/agent-buildernpm package
A critical malware incident was identified in the npm package @mastra/agent-builder. According to the GitHub Advisory (GHSA-hj75-mc88-g6xc), any computer that has this package installed or running should be considered fully compromised.\n\nThe advisory recommends that all secrets and keys stored on affected computers be rotated immediately from a different, uncompromised system. While the package should be removed, the advisory notes that full control of the computer may have been given to an outside entity, meaning there is no guarantee that removing the package alone will eliminate all malicious software that may have been installed as a result.\n\nThis is an active incident affecting the npm ecosystem and AI agent development tools.
Indicators of compromise
- Packages
- @mastra/agent-builder
Remediation
- Immediately rotate all secrets and keys from a different, uncompromised computer
- Remove the @mastra/agent-builder package from all affected systems
- Conduct a full security audit of any system that had this package installed
- Monitor affected systems for signs of unauthorized access or persistence mechanisms
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved
Sources
- GitHub Advisory GHSA-hj75-mc88-g6xc · GitHub Advisory Database
Cite this entry
"Malware in @mastra/agent-builder." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 17, 2026; last updated June 20, 2026. https://supplychainattack.org/incident/malware-in-mastra-agent-builder-1lzjf6
Suggest a correction
Found an error or have a newer source? Corrections to factual errors take priority over new entries.
Related incidents
- containedhigh
Microsoft links Mastra AI supply chain attack to North Korean hackers
Microsoft attributed a Mastra AI supply chain attack that compromised over 140 npm packages to North Korean hacking group Sapphire Sleet (BlueNoroff). The attack targeted the npm ecosystem and AI development infrastructure.
UNC1069npmAI agents & skillsCompromised packageMalicious maintainer - activecritical
Malware in @rafaelsene01/agent-flow
Malware discovered in the npm package @rafaelsene01/agent-flow. Systems with this package installed are considered fully compromised and require immediate remediation.
npmAI agents & skillsCompromised package - activecritical
Malware in @mastra/agent-browser
Malware was discovered in the npm package @mastra/agent-browser. Systems with this package installed or running should be considered fully compromised and require immediate remediation.
npmAI agents & skillsCompromised package - activecritical
Malware in @redhat-cloud-services/hcc-feo-mcp
Malware in @redhat-cloud-services/hcc-feo-mcp Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have
MiasmanpmAI agents & skillsCompromised package